Warp stop-motion.



A. KHAN. WARP STOP. MOTION. APPLIGATION FILED NOV.11, 1909.

Patented Dec. 26, 1911.

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circuit are or may ARTHUR 1mm, or nos'ron,

massacnusnr'rs, Assienon r0 AMERICAN- TEXTILE AP- PLIANCES GOMPANY, OE BOSTON, MASSACHUSETTS, A CORPORATION OF MAINE- W AB? STOP-MOTION.

To all whom it may concern:

Be it known that I, ARTHUR Boston, in the county of Suffolk and State of Massachusetts, have invented certain new and useful Improvements in Warp Stop- Motions, of which the following is a speclfication, reference being had to the accompany-ing drawings, forming part thereof.

This-invention has reference to improvements in warp stop motions for looms and relates more particularly to improvements in electrical warp stop motions without being limited thereto.

One object of this invention is to improve the construction of warp sto motions relative to the manner of sustaining the drop bars or devices.

Another object of the invention is to so construct a warp stop motion for looms having lease rods movable with the rise and fall of the warp that the drop bars or devices may follow the movement of such lease rods and, where such lease rods form terminals of an electrical circuit, be to move into contact with such lease rods upon the failure of a warp thread to sustain its drop bar.

Other objects of this invention will appearv from the following description.

-, The invention consists in the novel warp stop motion as hereinafter fully described and pointed out in the claims.

Figure 1, represents a cross sectional View of portions of a loom illustrating the new invention. Fig. 2, represents an elevation of parts of the same. Fig. 3, represents a sectional view similar to Fig. 1 illustrating relative positions of the drop bars and the terminals of an electric circuit under movement of the lease rods.

Similar numbers of reference designate corresponding parts throughout.

As shown in the drawings, in its preferred form, 5 indicates a bracket, one of a pair on which the terminals of an electric be mounted. These brackets 5 may form part of the loom frame or may be attached thereto and have sockets inwhich the ends of the stay bars 66 are secured by the set screws'77. In said brackets are supported the terminal rods 8, 8 and 9, 9 arranged in pairs the oflice of which will hereafter be pointed out. The upper portions of. said brackets are contracted to form the members 10 to which the Specification of Letters Patent. Application filed November 11, 1909. Serial No. 527,474.

-KEAN, of

always in position scribed in the Patent to E. Barnes,

- the clearance opening slotted plates 11 are adjustably secured b bolts 12 passing throu h the slots in said plates 11 and through the electric insulation 13 and secured in the members 10, said plates ll bein thus secured to but electrically lnsulate from the brackets 5. The plates 11 and the brackets 5 are connected with the electric circuit H which includes the battery B, or other source of electrical energy, and magnet M of any suitable and well known loom stopping mechanism such as that shown and described in Letters Patent to A. P. S. Maoquisten, No. 724,307, March 31, 1903.

On pivots i k-14 secured in the lower ends of plates 11 mounted cross bars 15, 15 having at their ends socket members 16, 16 in which the ends of the lease rods 17 17 are mounted. These lease rods are preferably made of or are covered by brass or other material adapted to conduct electrical 'energy or to form part of an electrical circuit and hence each of said lease rods 17, 17 forms one terminal of the electric circuita -y while a air of the rods 8, 9 form the other termiral thereof.

The drop bars preferably used in this warp stop motion, vbut which in their specific construction do not necessarily form art of the present invention or limitation thereof, are similar to the drop devices de- No. are formed of 851,337, April 23, 1907 and referably the thin sheet metal having straight edge 18 extending rom the upper end of the visual signal arm or detector, 19 approximatelv to tie lower end of arm 20 the main portion of which extends in line with said arm 19. Arm 21 extends, for the greater portion of its length, parallel with arm 20 but, at its upper portion curves away from said arm 20 to form the curved shoulder 23 while the space between said arms, following the curve of said shoulder forms 24. In thedrawings the edge of arm 20 is curved in a line with shoulder 23 of arm 21 and while this structure is preferred it is not necessarily essentialto the operation of the drop bar in its '.movement out of line with the pair of terminals 8, 9 as will hereafter be described.

In setting up a warp on a loom provided with this warp stop motion the warp threads w are crossed as shown in Figs. 1 and 3 of thedrawing, with their crossing approxi- Patented Dec; 26, 1911. I

mately coincident with the axis on which the cross bars 15 swing but preferably at .points slightly above said axis, as shown. The upper reach of each of the warp threads w, 41) between the lease rodsl7, 17 and said crossing point is now supplied with a drop bar or circuit closing device by passing said drop bar downward over the warp thread, which enters the space between arms 20 and'2l and then allowing the drop bar to drop into place on said warp thread as appears in Figs. 1 and 3 of the drawing. When the drop bar thus drops into place on a warp thread said drop is engaged by the warp thread at the upper edge of the clearance extension 24 and at a point out of the vertical median line of the drop bar so that the tendency is for the drop bar to swing, on said warp thread, in the direction toward which the drop bar isoverbalanced or overweighted, that-is, toward the associated lease rod 17, this tendency of movement being emphasized by the signal arm 19 acting as a counterweight located at the other side of said verticalmedian line of the drop from said point of support. Such tendency of the drop bar to swing on its warp thread in the'circuit closing direction is of course resisted by the edges ot its arms bearing against the terminals 8,9 with which it is in association and which may represent approximately the vertical median line of the drop. bar. With all of the warp threads thusvsupplied with drop bars the loom is set in motion and, under the rise and fall of the warp, the lease rod terminals 17, 17 swing with the cross bars 15, and the drop bars,

sustained on said upper reaches of the warp threads, move upward and downward in parallel paths, as indicated in full lines in Fig. 3 of the drawings while the lease rod terminals 17, 17 in this movement, describe arcs relative to the contact edge of said drop bars, and cooperate with said drop bars, when a warp thread breaks or becomes unduly loose, to complete the electric circuit w y. When a warp thread breaks or becomes unduly loose the drop bar, normally sustained by such thread, moves downward by gravity and tends to fall toward its related lease rod terminal 17, 17. In such downward move-- ment' of the drop bar the shoulder 23 ultimately rides against the terminal 8 and the lateral clearance 24 is brought to position to receive such terminal whereupon the drop bar swings on the fulcrum formed by the terminal 9 and the upper part or signal 19- of the drop swings toward, and finally into contact with its lease rod terminal to complete the electric circuit between one or both ofthe rods 8 or 9 and the lease rod terminal 17, while the signal arm 19 being out of line with the normally supported bars forms a visual signal to indicate the particular thread which requires attention, this iden-.

tification of the broken or loose thread being fallen drop bar under the rise and fall of the warp. With any of the drop bars in the circuit closing position shown. in brokenlines in Figs. 1 and 3 the lease rod terminals 17 in their movement with the warp, effect wiping contacts with the edges 18 of said drop bars and. such action tends to effect a similar action of the arms 20 or 21 on one or both of the terminals 8, 9.

It is evident that the terminals mounted to move with the cross bars 15 need not necessarily form lease rods and various other modifications of the mechanism may be made Without departing from the spirit of the invention. 4

Having thus described my invention 1 claim as new and desire to secure by Letters Patent.

1. A warp stop motion for looms comprising a lease rod movably mounted and forming the terminal of an electric circuit, a fixed terminal connected in said circuit and a series of circuit closing bars mounted on threads supported by said lease rod and having a sliding engagement with said fixed terminal.

2. A warp stop motion for looms comprisemphasized by the. movement of the nor- 'mally supported drop bars relative to the ing a pair of lease rods, for crossing the warp, movably mounted and forming terminals of an electric circuit which includes an electrically actuated member of a loom stopping mechanism, a pair of terminals fixed below and between said lease rods and connected with said electric circuit, and two series of circuit closing drop bars sustained on the upper reaches of the warp and slid: ing in engagement with said fixed terminals.

3. A warp stop motion for looms comprising a pair of lease rods dividing the warp into sheets and forming terminals of an electric circuit which includes an electrically actuated member of a loom stopping mechanism, a pair of fixed terminals connected with said circuit, and circuit closing tween said lease rods and connected with said circuit, and circuit closing drop bars supported by the warp between said lease fixed terminals.

rods and the crossing point of the warps said drop bars extending warps and being sli ably engaged with said 5. A warp stop motion for looms comprising pivoted lease rod supports, lease rods mounted thereon and adapted to eflect the crossing of the warps, said lease rods forming terminals of an electric circuit which includes the electrically a loom stopping mechanism, fixed terminals for said electric circuit located between said lease rods and the axis on which their supports swing, and belowthe same, and circuit closing drops slidably engaged thewarp at points between the vertical lines of said fixed terminals and the axis on which said lease rod supports swing.

6. A warp stop motion for looms comprising pivoted supports, lease rods mounted on said supports and forming the termi- .nals of an electriccircuit which includes the circuit closing electrically actuated member of a loom stop ping mechanism, said lease rods dividing the warp into sheets, circuit closers supported on the warp threads and adapted, upon the failure of the warp to contact with said lease rods, and fixed means, in electrical connection with said circuit, with which said circuit closers are engaged to resist the movement of said circuit closers under normal conditions of the warp.

7. A warp stop motion for looms comprising a lease rod movably mounted, a guide fixed with reference to said lease rod, an electric circuit connected with said lease rod and guide and including the electrically actuated member of a loom stopping mechanism, and a circuit closer mountedto'slide and swing on said guide and adapted to be sustained by an unbr oken warp thread in sliding relation with said guide.

8. A warp stop motion for looms comprising a circuit closer and means to guidethe same vertically, said circuit closer extendabove and below said actuated member of with ' said terminal rods,

ing above the path of the warp and having means engaging the warp, a lease rod mounted to swing with reference path of said circuit closer, and an electric circuit connected with said guide and said lease rod and including the-electrically actuated member of a loom stopping mechanism.

9. A warp stop motion for looms comprising pivoted supports, lease rods mounted thereon and adapted-to divide the warp in sheets with the crossing thereof approximately coincident with the axis on which said supports swing, drop bars engaged with the warp between the lease rods and the crossing of said warp and extending above and below the path of the warp, and means for guiding said drop bars vertically in parallel paths during the rise and 'fall of the warp.

10. A warp stop motion for looms comprising a terminal formed by two rods fixed one above the other, a movable lease rod terminal, an electric circuit connected with such terminals and including the electrically actuated member of a loom stopping mechanism, and a circuit closer having a longitudinal slot, engaged with said first mentioned terminal, and a clearance extension, of said slot, adapted to receive one of when said circuit closer moves sufliciently to permit the swinging of the upper portion of said circuit closer toward said lease rod.

11. A-warp stop motion for looms comprising a pivoted support, a pair "of lease rods mounted thereon and adapted to-divide the warp in sheets crossed between said rods,

drop bars'mounted on said warp and having a loom stopping motionioward said lease rods, and means for resisting such loom stopping movement of said drop bars under normal conditions.

ARTHUR KEAN.

Witnesses:

H. J. MILLER, E. H. WILDEB. 

